detect_PDFpen.scpt

getAppName()
on getAppName()
  tell application "Finder"
		try
			try
				set appName to name of application file id "com.smileonmymac.PDFpenPro"
			on error
				try
					set appName to name of application file id "com.smileonmymac.PDFpen"
				on error
					try
						set appName to name of application file id "com.smileonmymac.PDFpenPro.MacAppStore"
					on error
						set appName to name of application file id "com.smileonmymac.PDFpenPro6.MacAppStore"
					end try
				end try
			end try
		end try
	end tell
	return appName as string
end getAppName